Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GK9B
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): Speedometer Malfunction; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

Speedometer Malfunction

DESCRIPTION

The combination meter assembly receives vehicle speed signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication. The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU (brake booster with master cylinder assembly). The skid control ECU (brake booster with master cylinder assembly) supplies power to the vehicle speed sensor. The skid control ECU (brake booster with master cylinder assembly) detects vehicle speed signals based on pulses of the voltage.

HINT:

Factors that affect the indicated vehicle speed include the tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • Before starting the following inspection, inspect the speedometer and check that the tire size and air pressure are as specified.

    Tire size and air pressure: Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION

    Speedometer: Click here 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): ON-VEHICLE INSPECTION

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication DTCs are output.

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK FOR DTC (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

(a) Check if electronically controlled brake system DTCs are output.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): DIAGNOSTIC TROUBLE CODE CHART 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): DIAGNOSTIC TROUBLE CODE CHART

A

3.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Speed Signal Input (0)

Vehicle speed test signal input*

(0 km/h, 0 mph)

ON

-

Speed Signal Input (40)

Vehicle speed test signal input*

(40 km/h, 40 mph)

ON

The value displayed on the speedometer may deviate.

for Speedometer with Imperial Units for Main Scale:

  • Reference 40 (mph):

    39.6 to 42.4

for Speedometer with Metric Units for Main Scale:

  • Reference 40 (km/h):

    38.8 to 43.3

Speed Signal Input (80)

Vehicle speed test signal input*

(80 km/h, 80 mph)

ON

The value displayed on the speedometer may deviate.

for Speedometer with Imperial Units for Main Scale:

  • Reference 80 (mph):

    80.3 to 83.5

for Speedometer with Metric Units for Main Scale:

  • Reference 80 (km/h):

    79.4 to 84.4

Speed Signal Input (120)

Vehicle speed test signal input*

(120 km/h, 120 mph)

ON

The value displayed on the speedometer may deviate.

for Speedometer with Imperial Units for Main Scale:

  • Reference 120 (mph):

    121.3 to 124.5

for Speedometer with Metric Units for Main Scale:

  • Reference 120 (km/h):

    120.4 to 125.4

Speed Signal Input (160)

Vehicle speed test signal input*

(160 km/h, 160 mph)

ON

The value displayed on the speedometer may deviate.

for Speedometer with Metric Units for Main Scale:

  • Reference 160 (km/h):

    161.3 to 166.3

Speed Signal Input (200)

Vehicle speed test signal input*

(200 km/h, 200 mph)

ON

The value displayed on the speedometer may deviate.

for Speedometer with Metric Units for Main Scale:

  • Reference 200 (km/h):

    202.3 to 207.3

Speed Signal Input (240)

Vehicle speed test signal input*

(240 km/h, 240 mph)

ON

-
  • *: When this Active Test is performed, an actual vehicle speed signal is sent via CAN communication to the combination meter assembly to operate the speedometer. The seat belt warning buzzer, etc. may operate when performing this Active Test.

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (0)

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (40)

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (80)

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (120)

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (160)

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (200)

Body Electrical > Combination Meter > Active Test

Tester Display

Speed Signal Input (240)

OK:

Speedometer indication is normal.

OK

REPLACE SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

NG

REPLACE COMBINATION METER ASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL